forked from lowRISC/ibex
/
ibex_configs.yaml
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/
ibex_configs.yaml
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# Copyright lowRISC contributors.
# Licensed under the Apache License, Version 2.0, see LICENSE for details.
# SPDX-License-Identifier: Apache-2.0
# Ibex named configurations, each configuration must specify the same set of
# parameters.
# ============================
# * SUPPORTED CONFIGURATIONS *
# ============================
#
# Supported configurations are those that verification (such as nightly
# regression) and design effort is focussed on. Currently only the 'opentitan'
# configuration has nightly regressions but this will be expanded to all
# supported configurations.
# Two-stage pipeline without additional branch target ALU and 3 cycle multiplier
# (4 cycles for mulh), resulting in 2 stall cycles for mul (3 for mulh)
small:
RV32E : 0
RV32M : "ibex_pkg::RV32MFast"
RV32B : "ibex_pkg::RV32BNone"
RegFile : "ibex_pkg::RegFileFF"
BranchTargetALU : 0
WritebackStage : 0
ICache : 0
ICacheECC : 0
ICacheScramble : 0
BranchPredictor : 0
DbgTriggerEn : 0
SecureIbex : 0
PMPEnable : 0
PMPGranularity : 0
PMPNumRegions : 4
MHPMCounterNum : 0
MHPMCounterWidth : 40
# Configuration to match that used in the OpenTitan project
opentitan:
RV32E : 0
RV32M : "ibex_pkg::RV32MSingleCycle"
RV32B : "ibex_pkg::RV32BOTEarlGrey"
RegFile : "ibex_pkg::RegFileFF"
BranchTargetALU : 1
WritebackStage : 1
ICache : 1
ICacheECC : 1
ICacheScramble : 1
BranchPredictor : 0
DbgTriggerEn : 1
SecureIbex : 1
PMPEnable : 1
PMPGranularity : 0
PMPNumRegions : 16
MHPMCounterNum : 10
MHPMCounterWidth : 32
# Three-stage pipeline with additional branch traget ALU and 1 cycle multiplier
# (2 cycles for mulh) so mul does not stall (mulh stall 1 cycles). This is the
# maximum performance configuration ignoring the branch predictor (which isn't
# yet fully verified)
maxperf:
RV32E : 0
RV32M : "ibex_pkg::RV32MSingleCycle"
RV32B : "ibex_pkg::RV32BNone"
RegFile : "ibex_pkg::RegFileFF"
BranchTargetALU : 1
WritebackStage : 1
ICache : 0
ICacheECC : 0
ICacheScramble : 0
BranchPredictor : 0
DbgTriggerEn : 0
SecureIbex : 0
PMPEnable : 0
PMPGranularity : 0
PMPNumRegions : 4
MHPMCounterNum : 0
MHPMCounterWidth : 40
# maxperf config above with balanced bitmanip extension and PMP
maxperf-pmp-bmbalanced:
RV32E : 0
RV32M : "ibex_pkg::RV32MSingleCycle"
RV32B : "ibex_pkg::RV32BBalanced"
RegFile : "ibex_pkg::RegFileFF"
BranchTargetALU : 1
WritebackStage : 1
ICache : 0
ICacheECC : 0
ICacheScramble : 0
BranchPredictor : 0
DbgTriggerEn : 0
SecureIbex : 0
PMPEnable : 1
PMPGranularity : 0
PMPNumRegions : 16
MHPMCounterNum : 0
MHPMCounterWidth : 40
# ========================
# * OTHER CONFIGURATIONS *
# ========================
# Configurations that may be useful but aren't supported configurations.
# maxperf config above plus PMP enabled with 16 regions.
maxperf-pmp:
RV32E : 0
RV32M : "ibex_pkg::RV32MSingleCycle"
RV32B : "ibex_pkg::RV32BNone"
RegFile : "ibex_pkg::RegFileFF"
BranchTargetALU : 1
WritebackStage : 1
ICache : 0
ICacheECC : 0
ICacheScramble : 0
BranchPredictor : 0
DbgTriggerEn : 0
SecureIbex : 0
PMPEnable : 1
PMPGranularity : 0
PMPNumRegions : 16
MHPMCounterNum : 0
MHPMCounterWidth : 40
# maxperf-pmp config above with full bitmanip extension
maxperf-pmp-bmfull:
RV32E : 0
RV32M : "ibex_pkg::RV32MSingleCycle"
RV32B : "ibex_pkg::RV32BFull"
RegFile : "ibex_pkg::RegFileFF"
BranchTargetALU : 1
WritebackStage : 1
ICache : 0
ICacheECC : 0
ICacheScramble : 0
BranchPredictor : 0
DbgTriggerEn : 0
SecureIbex : 0
PMPEnable : 1
PMPGranularity : 0
PMPNumRegions : 16
MHPMCounterNum : 0
MHPMCounterWidth : 40
# maxperf-pmp-bmfull config above with icache enabled
maxperf-pmp-bmfull-icache:
RV32E : 0
RV32M : "ibex_pkg::RV32MSingleCycle"
RV32B : "ibex_pkg::RV32BFull"
RegFile : "ibex_pkg::RegFileFF"
BranchTargetALU : 1
WritebackStage : 1
ICache : 1
ICacheECC : 1
ICacheScramble : 0
BranchPredictor : 0
DbgTriggerEn : 0
SecureIbex : 0
PMPEnable : 1
PMPGranularity : 0
PMPNumRegions : 16
MHPMCounterNum : 0
MHPMCounterWidth : 40
# ===============================
# * EXPERIMENTAL CONFIGURATIONS *
# ===============================
# Configurations using experimental features that aren't yet verified and/or
# known to have issues.
experimental-branch-predictor:
RV32E : 0
RV32M : "ibex_pkg::RV32MSingleCycle"
RV32B : "ibex_pkg::RV32BNone"
RegFile : "ibex_pkg::RegFileFF"
BranchTargetALU : 1
WritebackStage : 1
ICache : 0
ICacheECC : 0
ICacheScramble : 0
BranchPredictor : 1
DbgTriggerEn : 0
SecureIbex : 0
PMPEnable : 0
PMPGranularity : 0
PMPNumRegions : 4
MHPMCounterNum : 0
MHPMCounterWidth : 40